If you spend any significant amount of time on a terminal in a *nix operating system, you’ve probably heard of tmux. For the uninitiated, tmux is a terminal multiplexer: From their site:
[tmux] lets you switch easily between several programs in one terminal, detach them (they keep running in the background) and reattach them to a different terminal. And do a lot more.
In addition, tmux lets you split your terminal vertically and horizontally to house multiple terminals side-by-side. You can also go crazy and customize a load of key bindings if you are so inclined.
One sticking point with tmux is it’s ability to interact with the system’s clipboard. Generally this involves using a command-line tool such as xclip, but configuration has been somewhat hairy. With tmux 1.8, you can do something like this:
bind-key -n -t emacs-copy M-w copy-pipe "xclip -i -sel p -f | xclip -i -sel c " bind-key -n C-y run "xclip -o | tmux load-buffer - ; tmux paste-buffer"
Try it out - you can get the latest version of tmux from the tmux website.